Blade for a fan



FIG. 1 is a front, top and left side perspective view of a blade for a fan showing my new design;

FIG. 2 is a front elevational view thereof, and the rear is symmetrical to the front shown;

FIG. 3 is a top plan view thereof, and the bottom is substantially identical to the top shown,

FIG. 4 is an enlarged right side elevational view thereof; and,

FIG. 5 is an enlarged left side elevational view thereof. 

The ornamental design for a blade for a fan, as shown and described. 